/*
 * Copyright (c) 2011 Imre Fazekas.
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the Brillien nor the names of its
 * terms and concepts may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package com.vii.brillien.ignition.jmx;

import com.vii.brillien.ignition.jmx.mbeans.*;
import com.vii.brillien.kernel.BrillienException;

import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
import java.io.IOException;

/**
 * Connection to a running Brillien instance
 */
public class BrillienConnection {

    /**
     * Connection information
     */
    private String                  address, serverName;
    private int                     port;

    /**
     * JMX Connector
     */
    private JMXConnector            jmxc;

    /**
     * MBeanServerConnection for JMX-based conneciton
     */
    private MBeanServerConnection   mbsc;

    /**
     * Proxy for ThreadMXBean
     */
    private ThreadImpl thread;

    /**
     * Proxy for MemoryMXBean
     */
    private MemoryImpl              memory;

    /**
     * Proxy for ClassLoadingMXBean
     */
    private ClassLoadingImpl        classloading;

    /**
     * Proxy for RuntimeMXBean
     */
    private RuntimeImpl             runtime;

    /**
     * Proxy for LiaisonMXBean
     */
    private LiaisonImpl             liaison;

    /**
     * Creates a new BrillienConnection instance and try to connect to the running Brillien application server
     */
    public BrillienConnection(String address, int port, String serverName) throws BrillienException {
        this.address = address;
        this.port = port;
        this.serverName = serverName;

        try {
            init();
        } catch (Exception e) {
            e.printStackTrace();
            throw new BrillienException( e.getMessage() );
        }
    }

    /**
     * Initializer method to get MXBean references
     */
    public void init() throws Exception {
        if( jmxc != null)
            finish();


        JMXServiceURL url = new JMXServiceURL(
		        "service:jmx:rmi:///jndi/rmi://" + this.address + ":" + this.port + "/" + this.serverName
        );

        jmxc = JMXConnectorFactory.connect(url, null);

        mbsc = jmxc.getMBeanServerConnection();

        thread = new ThreadImpl( mbsc );
        memory = new MemoryImpl( mbsc );
        classloading = new ClassLoadingImpl( mbsc );
        runtime = new RuntimeImpl( mbsc );
        liaison = new LiaisonImpl( mbsc );
    }

    /**
     * Getter method for the field thread
     */
    public ThreadImpl getThread() {
        return thread;
    }

    /**
     * Getter method for the field memory
     */
    public MemoryImpl getMemory() {
        return memory;
    }

    /**
     * Getter method for the field classloading
     */
    public ClassLoadingImpl getClassloading() {
        return classloading;
    }

    /**
     * Getter method for the field runtime
     */
    public RuntimeImpl getRuntime() {
        return runtime;
    }

    /**
     * Getter method for the field liaison
     */
    public LiaisonImpl getLiaison() {
        return liaison;
    }

    /**
     * Generates the name-representation of the connection instance
     */
    public String getName(){
        return this.address + ":" + this.port + "/" + this.serverName;
    }

    /**
     * Closes connection
     */
    public void finish(){
        try {
            jmxc.close();
        } catch (IOException e) {
            e.printStackTrace();  
        }
    }

}

